Can this be done with a Meteor Template?

Anyone know how to do this in spaceabars?

i…e. if recipientName is Mickey Mouse with recipientEmail of and referenceId is S123456 I want to my template (which gets compilated into an email) to include this commented script

it will get picked up by a mail processor.

more context here

Could I build the commented out script as a string in a helper and output that into the template?